thackston



(No Model.) 2 Sheets-Sheet 1. R. D. THAOKSTON.

SELF CLOSING HATGHWAY.

No. 328,361. Patented Oct. 13, 1885.

4) 7 M v D Evertaz l3] f ken/95012 Attest, 5564x239; l -z cizy UNITED STATES PATENT ()FFICE.

RICHARD D. THAGKSTON, OF. ST. LOUIS, MISSOURI, ASSIGNOR OF ONEIIALF TO HENRY I. COE, OF SAME PLACE.

SELF-CLOSING HATCHWAY.

.SPECIFICATION forming part of Letters Patent No. 328,361, dated October 13, 1885 Application filed March 17, 1885. Serial No. 159,155.

To aZZ whom it nuzy concern;

Be it known that I, RICHARD D. THACK: Mom, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Self-Closing Hatchways, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- .0 Figure 1 is a perspective view of my improved selfclosing hatchway. Fig. 2 is an elevation showing the doors closed, and Fig. 3 a similar view with the doors opened. Fig. 4 is a detail View of the cage, showing the up- 1 per cams in side view.

My invention relates to a self-closing hatchway adapted to either passenger or freight elevators, orto dumb-waiter elevators; and my invention consists in certain details of construction, as hereinafter described, and pointed out in the claims.

Referring to the drawings, A represents a floor and ceiling of a building; B, the batch way; 0, the doors for closing the hatchway;

I the cage thathas hoisting and lowering rope or cable J. The doors are suspended or supported on arms L, hinged by brackets M, or other suitable means, to the uprights D or other fixtures. The arms are preferably bifurcated at their lower ends to afford means for a more rigid attachment to the doors. The doors are notched'out at N, to permit the en trance between them of the sharp points of the cams O, secured to the top and bottom of the cage on one or both sides, preferably both, as shown in Fig. 4, tied together by bracerods 1?. These cams taper toa sharp point,

D, the uprights or guides of the elevator, and

(No modelJ and as the cage ascends and descends they swing the doors open, as shown in Fig. 3, and 0 after the cage has passed the doors swing shut, bearing against the cams on the bottom of the cage, if the cage is going up, and against those on the top of the cage, if the cage is go ing down.

The doors are preferably located between the floor and ceiling of the building, as shown.

By my improved arrangement the door or doors can be opened with very little power, and can be constructed and put up at a small expense.

I claim as my invention 1. In a self-closing hatchway, the combination of the door and hinged arms, the door being'supported by the arms in such a manner as to swing shut of its own weight, substantially as shown and described.

2. In a self-closing hatchway, the combination oft-he door and arms, the door being supported by the arms,and the arms extended inward and upward from the door and hinged at their upper ends to a support, the whole being constructed and arranged substantially as shown and described, whereby the door closes by its own weight, as specified.

3. In a self-closing hatchway, in combination with the uprights, the brackets M, secured to the uprights, inclined arms L, hinged to the brackets, and doors 0, secured to the lower end of and supported by the arms andadapted to close by their own weight, substantially as set forth.

RICHARD D. THACKSTON. In presence of- GEO. H. KNIGHT, BENJN. A. KNIGHT. 

